102808920 has 64 divisors (see below), whose sum is σ = 309834720. Its totient is φ = 27290624.

The previous prime is 102808897. The next prime is 102808939. The reversal of 102808920 is 29808201.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26122 + ... + 29798.

Almost surely, 2^102808920 is an apocalyptic number.

102808920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 102808920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (154917360).

102808920 is an abundant number, since it is smaller than the sum of its proper divisors (207025800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

102808920 is a wasteful number, since it uses less digits than its factorization.

102808920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3924 (or 3920 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 102808920 is about 10139.4733591050. The cubic root of 102808920 is about 468.4647658481.

The spelling of 102808920 in words is "one hundred two million, eight hundred eight thousand, nine hundred twenty".